Glue-applying mechanism



M. HIRSCHKORN.

GLUE APPLYING MECHANISM. APPLICAHON mu) FEB. 28, 1920.

1,365,590. Patented Jan. 11, 1921.

INVENTOR ATTORNEYS.

UNITED STATES MORRIS 'HI'RSGHKORN, OF NEW YORK, N. Y., ASSIGNOR TO CHARLESGREEN PATENT OFFICE.

com-

PANY, INCL, OF NEW YORK, N. Y., A CORPORATION OF NEW "YORK.

GLUE-APPLYING MECHANISM.

Application filed February 28, 1920. Serial No. 361,992.

To aZZ whom z't may concern: I

Be it known that I, MORRIS HInsoi-rKoRN, a citizen of the United States, residing at 1030 Bryant avenue, Bronx, in the county of Bronx, city and State of New York, have invented certain new and useful Improvement in Glue-Applying Mechanism, of which the following is a specification.

My invention relates to" a new and improved apparatus for applying glue to sheets of paper. Machinesfor this purpose are well-known but they cannot fulfil the purposes desired to be accomplished by this invention.

One of the objects of my invention is to provide a machine inwliicli the glue can be applied to I; the sheets of paper while they are in a fiat condition. Y 1

Another object of my invention is to provide a machine in which the glue can be applied to substantially the entire sheet of paper or to any desired portion thereof.

Another object of my invention is to provide a regulated pressure of the glue applying roller on the sheet of paper whilethe said sheet of paper is held in a flat condition.

Another objectof-my invention is to .pro-

vide a machine in which glue can be successively applied 'to a number of sheets of pa or arranged in-a pile.

ther objects of my invention will be set forth in the following description and drawings which illustrate a preferred embodiment thereof.

Figure 1 is a side view thereof.

Fig. 2 is an end view thereof.

Fig. 3 is a section along the line 3-3 of Fig. 1.

Fig. 1 is an end view partially in section of Fig. 5 andshows one embodiment for providing a regulated pressure of the glue applying roller against the sheet of paper.

Fig.5 is a section along the line 55 of Fig. 4.

Fig. 6 is a sectional view illustrating another embodiment for'providing a regulated pressure between the glue applying mechanism and the sheet of paper.

Fig. 7 is a side view of Fig. 6.

The adhesive or glue is contained in a glue pot 10 the front wall 17 of which has an arcuate portion at the bottom thereof, which fits snugly against the adjacent sur- Specification of Letters Patent.

Patented Jan. 11, 1921.

face of the glue applying roller 12 which for convenience may be called the glue roller. The glue roller 12 is pivoted to a slotted arm 15 which is adjustably secured to the bottom 14 of the glue pot 10 by means of the set screw 16.-

The glue pot 10 is provided with guide pro ections 11 which fit between uprights 6 and 7 secured to the base-1 by means of screws 8.

The glue pot 10 is secured to the lower ends of cords or belts -9 which are coiled upon pulleys 25 fixed to a shaft 22 so that the revolution of the shaft 22 tends to wind or unwind the belts 9 so as to cause the glue pot 10 to be raised or lowered.

The shaft 22 is provided with a handle 50 so that it can be revolved, and it is also provided with a ratchet wheel 21, with which a pawl 18 pivoted at 19 cooperates so that the glue pct 10 can be held at any desired height.

The pawl 18 is provided with a handle 20 whereby it can be disengaged from the ratchet 21. The base-1 of the machine is provided with rails 26 which may be adjustably secured to the base 1,-and between which a pile of sheets of paper 2 may be located.

Theshaft 22 may be provided with a friction sleeve 28'or with any other suitable braking means which can retard the revolutionof the shaft 22'when it is caused to revolveby. the weight of the pot 10.

The operation of my device is. as follows p The operator winds up the belts 9 so as to raise the pot 10 with its roller12 above the level of the sheets of paper.

Then after the sheets of paper have been pushed into place, the pawl 18 is raised when the weight of the pot 10, together with the weight of the glue-in the said pot 10, causes it to slowly fall until its roller 12 touches the top a. of thepile of paper when the roller 12 rests against'the top sheet with a pressure which is dependent upon the weight of the pot :and the glue contained therein, and the frictional retardation caused by the friction sleeve or brake '23.

The operator now pulls off the sheets of paper one by one, the pawl 18 of course being held disengaged in the meantime. This causes the glue to be applied bymeans of;

the revolution of the roller 12 to the top of each sheet of paper. The glue cannot ooze out of the pot because it is thick and because the front 17 of the pot 10 fits snugly against the roller 12 as before explained.

As the glue is applied to successive sheets of paper, the pot slowly falls so as to always maintain the correct position.

The pile of paper may be so positioned that substantially the entire top of each sheet of paper receives the glue from the roller 12, or any desired portion may be caused to have glue applied thereto.

hen thin paper is used in the machine, the pressure of the roller 12 against each sheet of paper is lessened by increasing the frictional effect of the sleeve 23. It is preferable to make the glue pot 10 heavy so that there is no substantial difference inpressure caused, as the glue is used up.

In order to provide a means whereby the operator can readily determine the pressure with which the roller 12 bears against the paper, two devices are shown. In the embodiment shown in Figs. 4 and 5, the friction sleeve 23 which has resilient limbs 28, which may be forced together to any desired extent so as to cause any desired degree of pressure of the friction sleeve 23 on the shaft 22 by turning the wing head 24 of a threaded member passing through the limbs 28 as shown in Fig. 5, and it can revolve with respect to the bracket 29 which is secured to the top 5 of the machine.

This is accomplished as shown in Figs. 4: and 5 by causing the bracket 29 to have a cross head 34 which fits into a groove in the top of the sleeve 23. The sleeve 23 is provided with the hook 30 having an index pointer, and a spring 31 secured to the pin 45 is connected to this hook 30.

A scale 32 is secured to the top 5 of the machine as shown in Fig. 5.

To use this embodiment, the operator turns the wing head 2 1 until the pointer of the hook 30 is at the desired part of the scale before the backward pull of the spring 31 causes the sleeve 23 to slip on the shaft 22.

In this manner the operator knows exactly what frictional retardation is being imposed upon the revolution of the shaft 22 and he can be told the figures upon the scale 32 to which the pointer of the hook 30 must be directed for any desired thickness of paper.

In the embodiment shown in Fig. 6, the shaft 22 is provided with a friction disk 36. In the embodiment shown in Fig. 6, the left-hand side of the shaft 22 may be supported as shown in Fig. 2, so as to provide a suitable bearing therefor. A threaded sleeve 37 is secured to either the side upright 3 or the side upright 4 of the machine.

A correspondingly threaded member 38 having a resilient nose 51 is screwed into the member 37 until the nose 51 presses firmly against the friction disk 36.

An arm 39 is secured to the member 38. This is provided with a weight 40 which slides thereon and can be secured to any portion thereof by any suitable means, which are not shown in the drawing, as in themselves they are old and well-known and form no part of my invention.

In the drawings, the shaft 22 and hence the friction disk 36 is supposed to revolve counter-clockwise when the observer stands at the right of the machine, that is, adjacent the lever arm 39, when the glue pot 10 descends.

The effect of the weight 10 is to cause the lever 39 to descend so as to press the nose 51 firmly against the disk 36, and thus lock the lever 39 against any movement substantially below the horizontal.

When the shaft 22 revolves, the lever 39 is raised until the threading of the member 38 causes it to be moved away from the friction disk 36, whereby the nose 51 no longer bears firmly against the friction disk 36 and the weight to causes the lever 39 to revolve back into its original position.

In this manner, as the shaft 22 revolves while the glue pot descends, the lever arm 39 moves from a position slightly below the horizontal to a position slightly above the horizontal, then falls back into its ori inal position and this action is continued. his causes a retardation of the movement of the shaft 22 which is proportional to the position of the weight so and the operator can be told what position the weight 40 should have for any given thickness or strength of paper.

I have described a preferred embodiment of my invention but it is clear that numerous changes and omissions can be made without departing from the spirit thereof. Thus the form of the glue applying mechanism can be changed and other means to retard the revolution of the shaft might be employed.

lthough in the embodiment shown herein, the glue pot is caused to descend under the force of gravity, it would be an obvious equivalent to have it move under the action of a spring or the like in any path other than the vertical.

I claim 1. In a glue applying mechanism, a support adapted to carry a pile of articles to which the glue is to be applied, a glue container so mounted that it can have a motion of translation, and having a glue applying mechanism secured thereto so that the said glue applying mechanism may retain its relative position with respect to a given end of the said pile of objects, means for controlling the movement of the said glue container so as to control the pressure with which the said glue applying mechanism bears against the uppermost of the said 9bects.

2. In a glue applying mechanism, the combination of a support adapted to carry a pile of objects, a shaft located above the said support, a glue container having glue applying mechanism secured thereto, the said glue container being secured to belts coiled upon the said shaft, and means for controlling the revolution of the said shaft so as to enable the said glue container to fall with a retarded motion toward the said support, whereby the pressure with which the said glue applying mechanism bears against the said uppermost member of the said pile of objects can be regulated.

3. In a glue applying mechanism, the

combination of glue applying means mounted so as to move in a definite path, retarding mechanism adapted to retard the movement of the said glue applying means, an indicating mechanism for indicating the amount of retardation imposed by the said retarding mechanism.

4. In a glue applying mechanism, the combination of a shaft, a glue pot connected to the said shaft so that it is moved up and down by the revolution of the said shaft, a glue roller connected to the said glue pot and adapted to remove glue therefrom when it is turned, a support underneath the said glue pot and adapted to support objects upon which the said glue roller can rest, an internally threaded member located at one side of the said shaft, a second externally threaded member cooperating with the first mentioned internally threaded member, the direction of the threading being such that when the glue pot moves down and the said shaft is turned, the turning of the said externally threaded member in the same direction tends to move it away from the said shaft, the said externally threaded member having a nose adapted to bear against the end of the said shaft, and a lever arm conuected to the said externally threaded member and adapted to carry a weight, so that the action of the said weight tends to force the nose of the externally threaded member against the end of the shaft.

In testimony whereof I hereunto affix my signature.

MORRIS HIRSCHKORN. 

